From hoverboarding to barefoot skiing, Devin Graham (@devinsupertramp) has caught plenty of extreme-sports moments on film. Through YouTube talent management company FullScreen, Graham has been able to shoot videos for major companies like Intel, Mountain Dew, and SpeedStickGear.

Subscribers: 2,306,935

Views: 397,586,011

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Mike Tompkins has an amazing one-man a capella act.

Tompkins first got the Internet's attention with his cover of Katy Perry's "Teenage Dream." Four years later, he's rolling out an album of original songs and setting off on a seven-city tour.

Subscribers: 1,271,736

Views: 184,369,467

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Dulce Ruiz became a beauty and fashion YouTube star after returning from service in Iraq.

Alba Garcia teaches her hundreds of thousands of subscribers how to make their own natural makeup.

Garcia, who goes by SunKiss Alba on YouTube, specializes in DIY tutorials for creating natural-looking hair and makeup. With a total of more than 17 million views, they seem to really be catching on.

Subscribers: 416,137

Views: 17,897,327

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Alex Boye puts an African twist on hit pop songs.

Boye takes popular songs like Pharrell's "Happy" and Lorde's "Royals" and transforms them into a completely different, ethnic-sounding work. His cover of "Let it Go" from Frozen went totally viral, earning more than 48 million views.

Subscribers: 289,862

Views:64,847,341

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Lilly Singh does a little bit of everything.

From comedy sketches to music videos, Singh (or Superwoman, as she's known on YouTube) has a vastly entertaining channel and a devoted fan base. Her videos recently landed her on the Collective Digital Studio network, which has more than 700 channels of creators.

Subscribers: 3,534,111

Views:351,248,342

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Nikki Limo is an LA-based comedian who makes some pretty outrageously funny videos.

Limo posts a comedy sketch to her channel every Wednesday, covering a huge range of topics in dating in the modern era. She also has a second channel where she shares daily vlogs with more than 26,000 subscribers.